无法在knitr中使用"beamer_presentation"选项交叉引用图和表 [英] Impossible to cross-referring figures and tables with `beamer_presentation` option in `knitr`

问题描述

为什么 \ @ ref()表示法不能与Beamer-presentation一起使用?

以下问题可能会在编织PDF文档时提醒您一些有关交叉引用的问题，例如

我的环境

• R版本3.5.1(2018-07-02)
• 平台:x86_64-w64-mingw32/x64(64位)
• 在以下操作系统上运行:Windows 10 x64(内部版本17134)
• knitr_1.20
• rmarkdown_1.10
• RStudio v1.2.1206 (预览版)<-我更喜欢此原因

MWE

我在此处发布的MWE是通过以下来源创建的: test-beamer.Rmd 和 myref.bib .

test-beamer.Rmd

  ---标题:测试"字幕:||字幕，|换行作者:||CLR|拉斐尔研究所:|我现在就在这，|现在我在那里date:`r format(Sys.time()，'％​​Y/％b/％d')`"#英语输出:beamer_presentation:keep_tex:是的latex_engine:lualatex主题:"AnnArbor"colortheme:海豚"fonttheme:"structurebold"toc:正确#toc_depth:3#number_sections:正确fig_caption:正确开发:cairo_pdf#extra_dependencies:子图citation_package:natbibslide_level:2参考书目:bibs/myref.bib书目风格:apaalways_allow_html:是---```{r setup，include = FALSE}knitr :: opts_chunk $ set(echo = FALSE)```## 唯一的事情使用表\ @ref(tab:under-pressure-table)，@ test-master显示图\ @ref(fig:under-pressure)表示...##我想在其中引用数字的带有项目符号的幻灯片-\ @ref(图:欠压)-@测试大师-\ @ref(tab:under-pressure-table)##滑动带R输出```{r汽车，echo = TRUE}摘要(汽车)```##带图滑动```{r压力不足，fig.cap ='压力不足'，fig.pos ='h'，out.width ="0.75 \\ textwidth"}情节(压力)```##滑台```{r under-pressure-table，caption ="This is a table"}针织物::电缆(压力)```##更非凡使用表\ @ref(tab:under-pressure-table)，@ test-master显示图\ @ref(fig:under-pressure)表示... 

我在图块上添加了 fig.cap ='Under Pressure'，fig.pos ='h'，out.width ="0.75 \\ textwidth" 和caption =这是一个表" 到 knitr :: kable().没有这些代码，标题和表格/数字都根本不会出现...但是，即使将它们提供给整个 .Rmd 文件，问题仍然存在，除非您执行@Yihui的回答.

myref.bib

  @master {test-master，作者= {弗雷迪·水星(Freddie Mercury)和布莱恩·梅(Brian May)和约翰·迪肯(John Deacon)和罗杰·泰勒(Roger Taylor)}，title = {波西米亚风{R} hapsody:{W} e是冠军}，学校= {{Queen}}，年= {2018}，地址= {伦敦}} 

解决方案

\ @ ref()表示法仅是 bookdown 的功能.要将此功能移植到一般的R Markdown文档中，您可以设置某种 bookdown 输出格式(例如

)的 base_format 选项

 输出:bookdown :: pdf_book:base_format:rmarkdown :: beamer_presentation 

请参见 bookdown 图书的第3.4节第了解详情.

适合该问题的MWE的已完成yaml部分可能是这样的:

  ---标题:测试"字幕:||字幕，|换行作者:||CLR|拉斐尔研究所:|我现在就在这，|现在我在那里date:`r format(Sys.time()，'％​​Y/％b/％d')`"#英语输出:bookdown :: pdf_book:base_format:函数(...，number_sections)rmarkdown :: beamer_presentation(...)"number_sections:正确keep_tex:是的latex_engine:lualatex主题:"AnnArbor"colortheme:海豚"fonttheme:"structurebold"toc:正确fig_caption:正确开发:cairo_pdf#extra_dependencies:子图citation_package:natbibslide_level:2参考书目:bibs/myref.bib书目风格:apaalways_allow_html:是--- 

Why does \@ref() notation fail to operate with beamer-presentation?

The following question may remind you some questions on cross-reference when knitting PDF document, e.g. this, but the methods introduced in the answers have not help me when I make beamer-presentations.

Now I'm confused because \@ref(fig:label-to-refer-figure) and \@ref(tab:label-to-refer-table) notation to refer a figure/table does not work when I am knitting an .Rmd file with the option output: beamer_presentation. As shown in the following images, the raw codes for the cross-reference appear on the outputted PDF file and I cannot refer the figure/table number. Although the citations go well even in the listed environment as well as in plain text field, cross-reference for figure/table number does not properly take effect.

My environment

• R version 3.5.1 (2018-07-02)
• Platform: x86_64-w64-mingw32/x64 (64-bit)
• Running under: Windows 10 x64 (build 17134)
• knitr_1.20
• rmarkdown_1.10
• RStudio v1.2.1206 (Preview Version) <- I prefer this for this reason

MWEs

The MWE I post here is created from the following sources: test-beamer.Rmd and myref.bib.

test-beamer.Rmd

---
title: "Test"
subtitle: |
  | subtitle,
  | with a line break
author: |
  | CLR
  | Rafael
institute: |
  | Now I'm here,
  | Now I'm there
date: "`r format(Sys.time(), '%Y/%b/%d')`" #English
output: 
  beamer_presentation:
    keep_tex: yes
    latex_engine: lualatex
    theme: "AnnArbor"
    colortheme: "dolphin"
    fonttheme: "structurebold"
    toc: true
    #toc_depth: 3
    #number_sections: TRUE
    fig_caption: TRUE
    dev: cairo_pdf
    #extra_dependencies: subfig
    citation_package: natbib
    slide_level: 2 
bibliography: bibs/myref.bib
biblio-style: apa
always_allow_html: yes
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
```

## The only thing

With Table \@ref(tab:under-pressure-table), @test-master shows that Figure \@ref(fig:under-pressure) depicts...

## Slide with Bullets in which I want to refer a figure

- \@ref(fig:under-pressure)
- @test-master
- \@ref(tab:under-pressure-table)

## Slide with R Output

```{r cars, echo = TRUE}
summary(cars)
```

## Slide with Plot

```{r under-pressure, fig.cap='Under Pressure', fig.pos='h', out.width="0.75\\textwidth"}
plot(pressure)
```

## Slide with Table

```{r under-pressure-table, caption = "This is a table"}
knitr::kable(pressure)
```

## More extraordinary

With Table \@ref(tab:under-pressure-table), @test-master shows that Figure \@ref(fig:under-pressure) depicts...

EDIT: I added fig.cap='Under Pressure', fig.pos='h', out.width="0.75\\textwidth" to the figure chunk, and caption = "This is a table" to the knitr::kable(). Without these codes, neither the caption nor table/figure numbers appear at all... However, the problem persists even after giving them to the entire .Rmd file, unless you carry out @Yihui's answer.

myref.bib

@master{test-master,
author = {Freddie Mercury and Brian May and John Deacon and Roger Taylor},
title = {Bohemian {R}hapsody: {W}e are the champions},
school = {{Queen}},
year = {2018},
address = {London}
}

解决方案

The \@ref() notation is a feature of bookdown only. To port this feature to general R Markdown documents, you may set the base_format option of a certain bookdown output format, e.g.,

output:
  bookdown::pdf_book:
    base_format: rmarkdown::beamer_presentation

See Section 3.4 of the bookdown book for details.

The completed yaml section which suits for the MWE of this question may be like this:

---
title: "Test"
subtitle: |
  | subtitle,
  | with a line break
author: |
  | CLR
  | Rafael
institute: |
  | Now I'm here,
  | Now I'm there
date: "`r format(Sys.time(), '%Y/%b/%d')`" #English
output:
  bookdown::pdf_book:
    base_format: "function(..., number_sections) rmarkdown::beamer_presentation(...)"
    number_sections: true
    keep_tex: yes
    latex_engine: lualatex
    theme: "AnnArbor"
    colortheme: "dolphin"
    fonttheme: "structurebold"
    toc: true
    fig_caption: TRUE
    dev: cairo_pdf
    #extra_dependencies: subfig
    citation_package: natbib
    slide_level: 2     
bibliography: bibs/myref.bib
biblio-style: apa
always_allow_html: yes
---

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